[kpm] kgp-idea-proto: Create special binaryValidationApiElements configuration

This will be a 'lean' jar file (un-shadowed), which can later
be used by the binary-compatibility-validator to test the
API surface against.

^KT-52568 Verification Pending

libraries/tools/binary-compatibility-validator/src/test/kotlin/org.jetbrains.kotlin.tools.tests/RuntimePublicAPITest.kt

@@ -42,7 +42,7 @@ class RuntimePublicAPITest {
 
     @Test fun kotlinGradlePluginIdeaProto() {
         snapshotAPIAndCompare(
-            "../kotlin-gradle-plugin-idea-proto/build/libs", "kotlin-gradle-plugin-idea-proto(?!-[-a-z]+)",
+            "../kotlin-gradle-plugin-idea-proto/build/libs", "kotlin-gradle-plugin-idea-proto-api(?!-[-a-z]+)",
             nonPublicAnnotations = listOf("org/jetbrains/kotlin/gradle/kpm/idea/InternalKotlinGradlePluginApi")
         )
     }